Lighting devices and lighting systems

A lighting device includes a light emitting module, a driver, a wireless communication module, and a signal converter. The light emitting module includes light emitting elements and an antenna pattern. The light emitting elements are mounted on a first surface of a circuit board. The antenna pattern is in the first surface or a second surface of the circuit board. The driver sets current applied to the light emitting elements based on control data including current setting information. The control data is wirelessly received through the antenna pattern from an external user terminal. The light emitting module includes a wireless communication module directly connected to the antenna pattern to receive the control data, and a signal converter to convert the control data to a control signal and provide the control signal to the driver.